元古宙

Traditional form:

元古宙

Pinyin (reading):

Yuángǔzhòu

Definitions:

• pre-Cambrian (geological eon 2500-645m)

Characters:

• 元 - first; dollar; origin; head
• 古 - old, classic, ancient
• 宙 - space, time, space-time

Traditional characters:

• 元 - first; dollar; origin; head
• 古 - old, classic, ancient
• 宙 - space, time, space-time